- Aug 7, 2013
- 20
Recently purchased a 2003 Trailblazer with the 5.3. 141K on the clock. I think it had little use the last two years.
This week my wife told me it has been starting hard. I give it a shot and see that it cranks fine but sometimes does not 'fire'. Thought is could be ignition or maybe fuel pump? Once running overall runs fine. Just waiting to have it not start and seems to be getting worse. Thoughts on where to start? I do have a couple engine codes related to the Knock Sensors and O2 Sensors but those seem to not be related. Will be tackling those in the coming weeks.
This week my wife told me it has been starting hard. I give it a shot and see that it cranks fine but sometimes does not 'fire'. Thought is could be ignition or maybe fuel pump? Once running overall runs fine. Just waiting to have it not start and seems to be getting worse. Thoughts on where to start? I do have a couple engine codes related to the Knock Sensors and O2 Sensors but those seem to not be related. Will be tackling those in the coming weeks.